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Trends in summer and winter nitrate concentrations in air within the ArcticTrends in summer and winter nitrate concentrations in air within the Arctic |
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Frequency and variation in the direction of air massesFrequency and variation in the direction of air masses arriving at Oulanka and Zeppelin over 4-year periods during the 1990s |
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Diversity indices (Shannon-Weaver means) for phytoplankton, zooplankton and zoobenthos in lakes and streams in the Murmansk regionDiversity indices (Shannon-Weaver means) for phytoplankton, zooplankton and zoobenthos in lakes and streams in the Murmansk region |
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Approximate forest damage zones in the vicinity of Monchegorsk and Nikel and the visible-damage and non-visible-damage zones on the Kola Peninsula and Finnish Lapland The inset shows coverage (%) of lichens (Hypogymnia physodes and Parmelia olivacea) onApproximate forest damage zones in the vicinity of Monchegorsk and Nikel and the visible-damage and non-visible-damage zones on the Kola Peninsula and Finnish Lapland The inset shows coverage (%) of [..] |
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Annual average of alkalinity and pH as measured in rivers in northern Fennoscandia and the Kola PeninsulaAnnual average of alkalinity and pH as measured in rivers in northern Fennoscandia and the Kola Peninsula |
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Annual average of sulfate and base cation concentrations as measured in rivers in northern Fennoscandia and the Kola Peninsula Note: SO4 (non-seasalt) estimated for river Utsjoki from total sulfurAnnual average of sulfate and base cation concentrations as measured in rivers in northern Fennoscandia and the Kola Peninsula Note: SO4 (non-seasalt) estimated for river Utsjoki from total sulfur |
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Median concentrations of sulfate, base cations, and nitrate in lakes of northern Fennoscandia and the Kola PeninsulaMedian concentrations of sulfate, base cations, and nitrate in lakes of northern Fennoscandia and the Kola Peninsula |
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Sensitivity of Arctic ecosystems to acid depositionSensitivity of Arctic ecosystems to acid deposition |
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Vegetation damage zones around NorilskVegetation damage zones around Norilsk |
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Anthropogenic NOx emissions for 1985 north of 30°NAnthropogenic NOx emissions for 1985 north of 30°N |
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Model calculations of sulfur deposition and fraction of dry deposition for the period July 1990 to June 1991 in northern Fennoscandia and the Kola PeninsulaModel calculations of sulfur deposition and fraction of dry deposition for the period July 1990 to June 1991 in northern Fennoscandia and the Kola Peninsula |
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Sulfur dioxide emissions from metallurgical industry sourcesSulfur dioxide emissions from metallurgical industry sources and major coal-fired power plants in Russia (there are no significant point sources north of 60º N in other Arctic countries; pale coloured [..] |
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Impact of soot deposited onto snow and ice surfaces in the ArcticImpact of soot deposited onto snow and ice surfaces in the Arctic. Polar ice reflects light from the sun back to space (a). As the ice begins to melt, less light is reflected and more is absorbed by [..] |
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Diatom-inferred Holocene pH histories of lakes in arctic Fennoscandia and the Kola PeninsulaDiatom-inferred Holocene pH histories of lakes in arctic Fennoscandia and the Kola Peninsula. Toskaljavri (a) is redrawn from Seppä et al. (2002), Tsuolbmajavri (b) from Seppä and Weckström (1999), [..] |
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Diatom-inferred recent pH-histories of 14 lakes and ponds in northern FennoscandiaDiatom-inferred recent pH-histories of 14 lakes and ponds in northern Fennoscandia. Note the different scales for age and pH. Figures A-C are from Korhola et al. (1999), D-E from Erola (1999), F-G [..] |
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